Hi Mathewjg,

I would start with the Jamey Aebersold Vol1. [/B]Intro to Improvisation.
This volume deals with the 3 chord types Maj, Min7th, and Dom7th (Ionian,Dorian and Mixolydian)
It deals exclusively with all the Diatonic Modes/Scales for the Major Scale. It has Tons of Information.
I bought it decades ago, and have not regretted doing do.